Dell PowerVault ML6000 - Manual (Page 76)

66 SCSI Commands
IDValid – A value of one indicates that the SCSI Bus Address field is valid. A value of zero indicates that it
is not.
LUValid – This field is not supported and is set to 0.
Logical Unit Number – This field is not supported and is set to 0.
SCSI Bus Address – When the IDValid field is set to one, this field contains the tape drive SCSI address.
This is only applicable to SCSI tape drives, and does not apply to Fibre Channel tape drives.
Source Valid (Svalid) – This field is set to 1 if the Source Storage Element Address field is valid, otherwise
it is set to 0.
Invert – This field is set to 0. The library does not support inverting media.
Source Storage Element Address – If the Source Valid field is set to 1, this field will contain the element
address of the last storage element the media was moved from.
Primary Volume Tag – If requested, this field contains the volume tag (bar code label) information for
media residing in this element address. Five to sixteen character barcode labels are supported.
Code Set – This field is set to:
• 0h – RESERVED.
• 1h – The device identifier field contains binary values.
• 2h – The device identifier field contains ASCII values.
Identifier Type – This field is set to:
• 0h – The Device Identifier, if the Identifier Length is set, lists the vendor specific device serial
number only.
• 1h – The Device Identifier lists the eight-byte Vendor Identification, followed by vendor specific
unique identifier information.
• 2h – The Device Identifier contains a Canonical form of IEEE Extended Unique Identifier, 64-bit
(EUI-64). In this case, the Identifier Length field is set to 8.
• 3h – The Device Identifier contains an FC-PH Name_identifier.
Identifier Length – This field contains the length in bytes of valid Device Identifier information. If no device
identifier is available, or the DVCID bit in the CDB is zero, the Identifier Length field is 0h and the Code Set
and Identifier Type fields are also 0h. If the DCVID bit is set, the Identifier Length may be set between 0 and
64 (40h) bytes, depending on the associated drive type.
Device Identifier – This field provides up to 64 bytes of device identifier information for the device
associated with the data transfer element. The format is Identifier Type 1, which is equivalent to the drive’s
Inquiry page 83h. The Identifier Length specifies the length of valid device identifier information. If the
DVCID bit in the CDB is zero, this field is omitted. The Device Identifier field is padded with ASCII character
20h (space) to fill the complete 64 bytes. If the DVCID bit is set and the Identifier Length is 0, this field will
still be 64 bytes long.